This wearable is better than any of Google's Android products.

Verily, the health company formerly known as Google Life Sciences, owned by Google's parent company, Alphabet, has released a smartwatch with the most robust health tracking system ever—but it's not for sale. Sorry, guys.

Called Study Watch, it’s designed to track physiological and environmental sensors—such as electrocardiogram (ECG), heart rate, electrodermal activity, and movement—over a long period of time. The watch will work as a wearable research tool for clinical studies and personalized healthcare.

It looks just like a normal watch, and Verily designed it to ensure people wear the thing 24/7 to get the most accurate tracking. Its battery lasts up to a week, and it encrypts and processes data in the Cloud, cutting down the need to sync it.

For now, Verily has partnered with the Personalized Parkinson’s Project, a multi-year study to identify patterns in the disease's progression and work toward more personalized treatments. Duke University and Stanford Medicine are also using Study Watch in long-term study that will follow approximately 10,000 participants for four years to better understand the transition to certain diseases, like cancer.

You might still benefit from the watch’s finding, even if you can’t buy it. Luckily for you, we can also recommend some pretty great substitutes.